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  • Biology  (218)
  • 2020-2022  (218)
  • 1950-1954
  • 1
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    Caribbean corals in crisis: record thermal stress, bleaching, and mortality in 2005 (2021)
    In:  http://aquaticcommons.org/id/eprint/11305 | 9 | 2020-10-12 13:47:59 | 11305 | Central Caribbean Marine Institute
    Details
    Publication Date: 2021-07-01
    Description: Background:The rising temperature of the world’s oceans has become a major threat to coral reefs globally as the severityand frequency of mass coral bleaching and mortality events increase. In 2005, high ocean temperatures in the tropicalAtlantic and Caribbean resulted in the most severe bleaching event ever recorded in the basin.Methodology/Principal Findings:Satellite-based tools provided warnings for coral reef managers and scientists, guiding both the timing and location of researchers’ field observations as anomalously warm conditions developed and spread across the greater Caribbean region from June to October 2005. Field surveys of bleaching and mortality exceeded prior efforts in detail and extent, and provided a new standard for documenting the effects of bleaching and for testing nowcast and forecast products. Collaborators from 22 countries undertook the most comprehensive documentation of basin-scale bleaching to date and found that over 80% of corals bleached and over 40% died at many sites. The most severe bleaching coincided with waters nearest a western Atlantic warm pool that was centered off the northern end of the Lesser Antilles.Conclusions/Significance:Thermal stress during the 2005 event exceeded any observed from the Caribbean in the prior 20 years, and regionally-averaged temperatures were the warmest in over 150 years. Comparison of satellite data against field surveys demonstrated a significant predictive relationship between accumulated heat stress (measured using NOAA CoralReef Watch’s Degree Heating Weeks) and bleaching intensity. This severe, widespread bleaching and mortality willundoubtedly have long-term consequences for reef ecosystems and suggests a troubled future for tropical marine ecosystems under a warming climate
    Description: NOAA Coral Reef Conservation Program
    Description: Article Nr: e13969
    Keywords: Biology ; Ecology ; Environment ; Fisheries ; Caribbean Sea ; coral reefs ; bleaching ; climate change ; temperature effects ; CCMI
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 1-9
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  • 2
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    Leaf growth of the seagrass Syringodium filiforme in outer Florida Bay, Florida (2021)
    In:  arthur@virginia.edu | http://aquaticcommons.org/id/eprint/14908 | 403 | 2014-03-11 22:34:30 | 14908 | United States National Ocean Service
    Details
    Publication Date: 2021-06-28
    Description: Leaf growth of the seagrass Syringodium filiforme (Kütz., 1860) was determined using a new technique based on the growth of emergent leaves (EL method) and compared to the more labor intensive repeated measurements (RM) and demographic allometric age reconstruction techniques (DA). All three techniques were used to compare leaf growth dynamics of plants with different morphologies at two sites, a shallow water (0.5 m) banktop and an adjacent deeper water (1.5 m) environment in outer Florida Bay, Florida. Leaf formation rates (Leaf Plastochrone Interval or PI) determined using the EL and RM methods were nearly identical, with means of 20 and 21 d leaf–1 at both sites, significantly faster than the 30 d leaf–1 calculated using the DA method. The EL method produced the highest estimate of leaf growth, 1.8 and 1.9 cm d–1 at the 0.5 m and 1.5 m sites, respectively, followed by the RM method (1.3 and 1.3 cm d–1) and the DA method (1.0 and 1.1 cm d–1). None of the methods detected differences in leaf PI, leaf growth or leaf fragmentation rates between sites. However, leaves at the 1.5 m site typically retained intact leaf tips longer than those at the 0.5 m site, and total leaf lifespan was longer at the 1.5 m site. Based on these results and the amount of field and laboratory work required by each of the methods, the new EL method is the preferred technique for monitoring leaf growth in S. filiforme.
    Keywords: Biology ; Ecology ; Management
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 571-585
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  • 3
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    Traditional and geometric morphometrics detect morphological variation of lower pharyngeal jaw inCoris julis(Teleostei, Labridae) (2021)
    In:  c.fruciano@unict.it | http://aquaticcommons.org/id/eprint/11248 | 9399 | 2013-07-04 18:44:22 | 11248
    Details
    Publication Date: 2021-06-30
    Description: In the present study, variation in the morphology of the lower pharyngeal element between two Sicilian populations of the rainbow wrasse Coris julis has been explored by the means of traditional morphometrics for size and geometric morphometrics for shape. Despite close geographical distance and probable high genetic flow between the populations, statistically significant differences have been found both for size and shape. In fact, one population shows a larger lower pharyngeal element that has a larger central tooth. Compared to the other population, this population also has medially enlarged lower pharyngeal jaws with a more pronounced convexity of the medial-posterior margin. The results are discussed in the light of a possible more pronounced durophagy of this population.
    Keywords: Biology ; Ecology ; Labridae ; wrasses ; pharyngeal jaws ; geometric morphometrics ; traditional morphometrics ; morphometrics ; durophagy ; plasticity ; phenotypic plasticity ; ecomorphology
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 320-327
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  • 4
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    Biology and ecology of the invasive lionfishes, Pterois miles and Pterois volitans (2021)
    In:  http://aquaticcommons.org/id/eprint/14849 | 403 | 2014-06-01 19:09:47 | 14849 | United States National Ocean Service
    Details
    Publication Date: 2021-06-26
    Description: The Indo-Pacific lionfishes, Pterois miles and P. volitans, are now established along the U.S. southeast coast, Bermuda, Bahamas, and are becoming established in the Caribbean. While these lionfish are popular in the aquarium trade, their biology and ecology are poorly understood in their native range. Given the rapid establishment and potential adverse impacts of these invaders, comprehensive studies of their biology and ecology are warranted. Here we provide a synopsis of lionfish biology and ecology including invasion chronology, taxonomy, local abundance, reproduction, early life history and dispersal, venomology, feeding ecology, parasitology, potential impacts, and control and management. This information was collected through review of the primary literature and published reports and by summarizing current observations. Suggestions for future research on invasive lionfish in their invaded regions are provided.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 409-414
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  • 5
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    Biological characteristics and mortality of western butterfish (Pentapodus vitta), an abundant bycatch species of prawn trawling and recreational fishing in a large subtropical embayment (2021)
    In:  http://aquaticcommons.org/id/eprint/8944 | 403 | 2012-06-27 16:54:38 | 8944 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-29
    Description: The western butterfish (Pentapodus vitta) is numerous in the bycatch of prawn trawling and recreational fishing in Shark Bay, Western Australia. We have thus determined crucial aspects of its biological characteristics and the potential impact of fishing on its abundance within this large subtropical marine embayment. Although both sexes attained a maximum age of 8 years, males grow more rapidly and to a larger size. Maturity is attained at the end of the first year of life and spawning occurs between October and January. The use of a Bayesian approach to combine independent estimates for total mortality, Z, and natural mortality, M, yielded slightly higher point estimates for Z than M. This result indicates that P. vitta is lightly impacted by fishing. It is relevant that, potentially, the individuals can spawn twice before recruitment into the fishery and that 73% of recreationally caught individuals are returned live to the water.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 512-520
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  • 6
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    The impact assessment of cage aquaculture on benthic communities along the south eastern Black Sea (2021)
    In:  http://aquaticcommons.org/id/eprint/22720 | 18721 | 2018-05-17 18:36:47 | 22720 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-09
    Description: The present study was conducted to examine the impact of cage aquaculture on benthic communities in coastal areas (depth 25 to 50 m) from fish farming operations located along the southeastern Black Sea (Ordu-Perşembe, Trabzon-Yomra and Rize central). Sampling was conducted seasonally from April 2007 to 2009. Sediment samples were taken using Ekman Grab (box core- 0.04 m2). Temperature, salinity, and water velocity were periodically measured to determine influencing sedimentary organic matter in the sediment, oxygenation, and anoxic conditions. In addition, grain size of sediment, organic carbon content, and distribution of benthic communities were investigated. In order to determine benthic impact of fish farms on the region, Shannon – Wiener diversity index (H’), AMBI (AZTI Marine Biotic Index) and M-AMBI (Multivariate- Marine Biotic Index) indices were used. Results of current study showed that benthic zone ecological quality of stations with number 01, 02, 03, and 04 at Ordu-Perşembefish-farming habitat was found to be very low. In autumn 2008, there were 3 species which belonged to Capitella capitata (844 individuals/m2), Capitella sp. (133 individuals/m2), and Heteromastus filliformis (311 individuals/m2) at OP-01 station. In addition, the impact of Trabzon-Yomra fish-farming activity on benthic communities was low. The degree of exposure for Rize fish-farming area in all seasons was quite low, which was not a significant negative impact.
    Keywords: Aquaculture ; Biology ; Fisheries ; Cage culture ; Benthic organisms ; Ecological quality ; Marine biotis indices ; Biology ; Physiology ; Black Sea ; Turkey
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 719-738
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  • 7
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    Isolation, identification and antimicrobial susceptibility of pathogenic Aeromonas media isolated from diseased Koi carp (Cyprinus carpio koi) (2021)
    In:  http://aquaticcommons.org/id/eprint/22910 | 18721 | 2018-06-06 01:14:41 | 22910 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-11
    Description: Aeromonas infections are the most common bacterial disease of cultured fish in China. In this study, a gram-negative bacillus was isolated from the liver of diseased koi carp (Cyprinus carpio koi), and named strain KC-2. The results of morphological and biochemical tests, as well as phylogenetic analysis derived from 16S rRNA and gyrB sequences indicated that the isolated strain KC-2 was highly identical to the known Aeromonas media ATCC 33907. Experimental infection assays were conducted, and pathogenicity was demonstrated in crucian carp (Carassius auratus) and zebrafish (Danio rerio). Antimicrobial susceptibility testing showed that the strain KC-2 was sensitive to cefalotin, cefixime, cefotaxime, gentamicin, netilmicin, azithromycin and chloramphenicol. This is the first report on the isolation and identification of A. media from diseased, cultured koi fish. The results of the study will provide a scientific reference for prevention of bacterial disease of koi carp and identification of A. media in fish.
    Keywords: Aquaculture ; Biology ; Fisheries ; Koi carp ; Aeromonas media ; Isolation ; Identification ; Antimicrobial susceptibility testing ; Biology ; Physiology ; China
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 760-774
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  • 8
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    Dípteros vectores (Cullicidae y Calliphoridae)de la provincia de Buenos Aires (2021)
    Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata | La Plata, Argentina
    In:  http://aquaticcommons.org/id/eprint/1583 | 196 | 2013-05-07 13:02:18 | 1583 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Details
    Publication Date: 2021-07-09
    Description: Secretaría de Política Ambiental, Gobierno de la Provincia de Buenos Aires
    Description: ProBiota: Programa para el Estudio y Uso Sustentable de la Biota Austral
    Description: COBIOBO (Comision de Biodiversidad Bonarense) no. 4
    Keywords: Ecology ; Education ; Health ; Biology ; Environment ; Diptera ; vectors ; Buenos Aires Province ; Argentina
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
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  • 9
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    Remote Sensing of Giant Reed with QuickBird Satellite Imagery (2021)
    In:  http://aquaticcommons.org/id/eprint/1612 | 3 | 2011-09-29 20:17:57 | 1612 | Aquatic Plant Management Society, Inc.
    Details
    Publication Date: 2021-07-09
    Description: QuickBird high resolution (2.8 m) satellite imagery wasevaluated for distinguishing giant reed (Arundo donaxL.) infestationsalong the Rio Grande in southwest Texas. (PDF has 5 pages.)
    Keywords: Management ; Biology ; Limnology ; Giant reed ; Arundo donax ; Rio Grande ; Texas ; QuickBird satellite imagery ; false color imagery ; normal color imagery ; image analysis ; accuracy assessment
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 81-85
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  • 10
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    Perspectives of marine biodiversity studies in Argentina (2021)
    In:  http://aquaticcommons.org/id/eprint/10044 | 4006 | 2015-06-01 17:36:45 | 10044 | Universidad Nacional de Mar del Plata
    Details
    Publication Date: 2021-06-29
    Description: This paper provides an overview of the research being carried out at the moment by a group of Argentinean scientists working on the subjects of marine biodiversity and oceanography. When the idea of the Census of Marine Life (CoML)was proposed following the Symposium held during the IAPSO-IABO conference in Mar del Plata in October 2001,there was a wide response from the marine scientific community. Information about current research projects, as well as plans for future work in the context of the CoML, were then obtained from about 70 scientists (Appendix I) belonging to 12 institutions located along the Argentinean coast (Appendix II, Figure 1). This has been used to illustrate what is currently being pursued in marine biodiversity in Argentina and which subjects are considered as priority for future research in the area. This paper is, thus, not an historical update of the knowledge of marine biodiversity, but it attempts to give an idea of the current situation and what is planned for the future. The development of an extensive database of what is known on marine biodiversity in the region is considered to be a necessity, but it constitutes a complete project on its own; as such it is included in the proposals for future work (see Future Work in this paper). It is emphasised thatthis synthesis is not exhaustive in the content of the topics being studied or in the number of researchers working in marine biodiversity in the country. It is, though, considered to be a representative sample of the knowledge in marine science in Argentina today. This is a starting point for the CoML project in South America and it is hoped that, as it develops, it will be improved by the active participation, advice and experience of many other scientists in the region.
    Keywords: Aquaculture ; Biology ; Ecology ; Environment
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 371-382
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