Age, Growth, and Reproductive Biology of a Data-deficient Parrotfish Species (Sparisoma Viride) in the US Caribbean PDF Download
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Author: Graham Alexander Wagner
Publisher:
ISBN:
Category : Fish stock assessment
Languages : en
Pages :
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Book Description
Coral reef ecosystems are declining globally, and anthropogenic influences have caused a shift from coral dominated reefs to algal dominated reefs. Reef grazers, like parrotfish, feed on algae growing in and on corals and prevent algal domination. In the US Caribbean, Stoplight Parrotfish (Sparisoma viride) is the most landed parrotfish species and has experienced dramatic increases in fishing pressures in recent years; however, recent stock assessments have been unsuccessful, citing a lack of basic life history information. This study addressed these data gaps, using a combination of fisheries-dependent and -independent samples to compare age, growth, and reproductive biology of Stoplight Parrotfish in Puerto Rico (PR), St Thomas (STT), and St Croix (STX). In all three islands, Stoplight Parrotfish showed year-round spawning seasonality with the potential for daily spawning. A small proportion of males appear to utilize an alternative mating strategy to avoid competition with haremic males, and some large females may maximize reproductive success by not undergoing sexual transition. Size and age structure differed significantly between the three islands, with more small fish in PR compared to STT and STX, and a smaller range of ages in STT. Fish from STT also grew more quickly and reached sexual maturity at a larger size than fish from PR and STX. Differences between the sampling locations may reflect differences in the gear and practices of the fisheries of the islands themselves, which supports the notion of island-specific management and regulations. The results of this study can be used for more successful stock assessments, and for creation of fishing regulations to protect these vital reef grazers.
Author: Graham Alexander Wagner
Publisher:
ISBN:
Category : Fish stock assessment
Languages : en
Pages :
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Book Description
Coral reef ecosystems are declining globally, and anthropogenic influences have caused a shift from coral dominated reefs to algal dominated reefs. Reef grazers, like parrotfish, feed on algae growing in and on corals and prevent algal domination. In the US Caribbean, Stoplight Parrotfish (Sparisoma viride) is the most landed parrotfish species and has experienced dramatic increases in fishing pressures in recent years; however, recent stock assessments have been unsuccessful, citing a lack of basic life history information. This study addressed these data gaps, using a combination of fisheries-dependent and -independent samples to compare age, growth, and reproductive biology of Stoplight Parrotfish in Puerto Rico (PR), St Thomas (STT), and St Croix (STX). In all three islands, Stoplight Parrotfish showed year-round spawning seasonality with the potential for daily spawning. A small proportion of males appear to utilize an alternative mating strategy to avoid competition with haremic males, and some large females may maximize reproductive success by not undergoing sexual transition. Size and age structure differed significantly between the three islands, with more small fish in PR compared to STT and STX, and a smaller range of ages in STT. Fish from STT also grew more quickly and reached sexual maturity at a larger size than fish from PR and STX. Differences between the sampling locations may reflect differences in the gear and practices of the fisheries of the islands themselves, which supports the notion of island-specific management and regulations. The results of this study can be used for more successful stock assessments, and for creation of fishing regulations to protect these vital reef grazers.
Author: Francesca M. Giambartolomei
Publisher:
ISBN:
Category : Osteichthyes
Languages : en
Pages : 158
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Book Description
Author: Ileana E. Clavijo
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 302
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Book Description
Author: Harms-Tuohy, C.A.
Publisher: Food & Agriculture Org.
ISBN: 9251354014
Category : Nature
Languages : en
Pages : 68
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Book Description
Parrotfishes are caught primarily by fish traps and spearfishing (targeted and incidental) for personal and commercial consumption. Over half (65 percent) of the responding countries and overseas territories indicated that they have either a complete harvesting ban or fishing regulations in place to promote the protection of parrotfishes to some extent. About half (56 percent) of the responding countries have fishery-independent surveys for parrotfishes, but the metrics evaluated by these surveys are not the same. Similarly, parrotfish-related outreach and education was varied throughout the Caribbean. Twelve countries (32 percent) report having specific parrotfish outreach campaigns or materials, while in other countries campaigns and materials were geared towards marine conservation in general. Most countries agree that long-term protection for parrotfishes is critical, but consensus about the specific measures required to achieve this is lacking.
Author: David K. Nickerson
Publisher:
ISBN:
Category : Parrotfishes
Languages : en
Pages : 25
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Book Description
Author: William C. Hamlett
Publisher:
ISBN:
Category : Vertebrates
Languages : en
Pages : 360
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Book Description
Author: Callum M. Roberts
Publisher:
ISBN:
Category : Biodiversity conservation
Languages : en
Pages : 276
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Book Description
Author: Bridget S. Green
Publisher: Springer Science & Business Media
ISBN: 140205775X
Category : Science
Languages : en
Pages : 313
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Book Description
Techniques and theory for processing otoliths from tropical marine fish have developed only recently due to an historic misconception that these organisms could not be aged. Otoliths are the most commonly used structures from which daily, seasonal or annual records of a fish’s environmental history are inferred, and are also used as indicators of migration patterns, home range, spatial distribution, stock structure and life history events. A large proportion of projects undertaken on tropical marine organisms involve removal and processing of calcified structures such as otoliths, statoliths or vertebrae to retrieve biological, biochemical or genetic information. Current techniques and principles have evolved rapidly and are under constant modification and these differ among laboratories, and more particularly among species and within life history stages. Tropical fish otoliths: Information for assessment, management and ecology is a comprehensive description of the current status of knowledge about otoliths in the tropics. This book has contributions from leading experts in the field, encompassing a tropical perspective on daily and annual ageing in fish and invertebrates, microchemistry, interpreting otolith microstructure and using it to back-calculate life history events, and includes a treatise on the significance of validating periodicity in otoliths.
Author: Giuseppe Fusco
Publisher: Cambridge University Press
ISBN: 1108499856
Category : Medical
Languages : en
Pages : 491
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Book Description
A look into the phenomena of sex and reproduction in all organisms, taking an innovative, unified and comprehensive approach.
Author: Peter F. Sale
Publisher: Gulf Professional Publishing
ISBN: 9780126151817
Category : Nature
Languages : en
Pages : 780
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Book Description
This book provides a comprehensive and up-to-date review of the ecology of coral reef fishes presented by top researchers from North America and Australia. Immense strides have been made over the past twenty years in our understanding of ecological systems in general and of reef fish ecology in particular. Many of the methodologies that reef fish ecologists use in their studies will be useful to a wider audience of ecologists for the design of their ecological studies. Significant among the impacts of the research on reef fish ecology are the development of nonequilibrium models of community organization, more emphasis on the role of recruitment variability in structuring local assemblages, the development and testing of evolutionary models of social organization and reproductive biology, and new insights into predator-prey and plant-herbivore interactions.