Reproductive biology aspects of Alopias pelagicus and A. superciliosus (Lamniformes: Alopiidae) in the Ecuadorian Pacific

Briones-Mendoza, Jesús; Carrasco-Puig, Pol; Toala-Franco, Daniel

doi:10.1590/1982-0224-2021-0015

Cited by 12 publications

(4 citation statements)

References 46 publications

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“…In addition, the high flow of genes into the population per generation also affects the genetic closeness of the two populations. Bigeye thresher shark (A. superciliosus) can migrate a great distance of more than 1500 miles (Briones-Mendoza et al 2021) and is a good swimmer (Frumkin and Shimada 2020). Thus, seasonal changes in abundance and distribution are thought to reflect seasonal migrations in latitude associated with changes in water temperature (Morales et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity of bigeye thresher shark (Alopias superciliosus Lowe, 1841) landed in Palabuhanratu Fishing Port, Sukabumi, West Java, Indonesia

et al. 2023

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Abstract. Kanedi MM, Wijayanti DP, Widowati I, Malik MDA, Yusmalinda NLA, Sembiring A. 2023. Genetic diversity of bigeye thresher shark (Alopias superciliosus Lowe, 1841) landed in Palabuhanratu Fishing Port, Sukabumi, West Java, Indonesia. Biodiversitas 24: 3488-3494. The bigeye thresher shark Alopias superciliosus (Lowe, 1841) is a highly migratory marine shark, widely distributed globally in tropical and temperate seas. The bigeye thresher shark is listed as a Vulnerable/VU species on the red list of the International Union for Conservation of Nature (IUCN) and listed on Appendix II of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). Genetics is a substantial essential approach to conservation, management, and sustainability. This study investigates the bigeye thresher shark’s genetic diversity and structure populations A. superciliosus that landed in Palabuhanratu Fishing Port, Sukabumi, West Java, Indonesia. Samples were collected in Palabuhanratu (n=16) and secondary data from the Atlantic Ocean (n=212) and Indian Ocean (n=16) sequences were obtained from GenBank. A total of 16 sequences of A. superciliosus have been amplified using mitochondrial DNA control region (dloop) with 857 bp in size sequenced. The Genetic diversity result showed haplotype diversity value in Palabuhanratu (Hd=0.86667; ?=0.01048) considered a high value. Overall, AMOVA and FST results showed significant differences in population structure between Palabuhanratu, Atlantic, and Indian Ocean with an FST value of 0.04420 (p-value <0.05). Based on the result, an effective strategy is needed to manage A. superciliosus sharks, both with the government and the private sector.

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Section: Discussionmentioning

confidence: 99%

Genetic diversity of bigeye thresher shark (Alopias superciliosus Lowe, 1841) landed in Palabuhanratu Fishing Port, Sukabumi, West Java, Indonesia

et al. 2023

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“…The relationship between the total length and length of the clasper of A. pelagicus is sigmoid, meaning that as the total length of the body increases, the length of the clasper also increases until it reaches its maximum length [13]. The results of the analysis from the study of Briones-Mendoza et al [19], showed a decrease in the average size of male A. pelagicus worldwide. This decline can be • The length of female A. pelagicus varies from 67.2 to 184 cm PCL, while males range from 69.0 to 178.4 cm PCL.…”

Section: Reproduction Of a Pelagicusmentioning

confidence: 99%

Effect of Life History on Alopias pelagicus Overexploitation Vulnerability: A Literature Review

Hewindati,

Novita Sari

2023

Leuser J. Environ. Stud.

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Alopias pelagicus Nakamura 1935 or pelagic thresher shark is an epipelagic species of shark prone to overexploitation due to its epipelagic habitat and slow life history. In 2019, based on existing data on abundance and exploitation, A. Pelagicus was included in the International Union for Conservation of Nature (IUCN) Red List of Threatened Species with the category of endangered (EN). This literature review analyzed the relationship between A. pelagicus life history and overexploitation susceptibility. The method used is a comprehensive search of international journals in online databases from ScienceDirect and Google Scholar with certain inclusion and exclusion criteria. Based on the criteria, seven out of 270 search results of international journal articles were included for the analysis. The results from the seven journal articles shows that A. pelagicus has a slow life history or k-selected life history. This life history is characterized by slow sexual maturity, low fecundity, long gestation period, annual reproductive cycle, slow growth, long lifespan, and low natural mortality rate. This life history makes A. pelagicus prone to overexploitation because if the mortality rate of catching exceeds the natural mortality rate, it will take a long time for A. pelagicus to return to their original population size.

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“…The biological aspects of Alopias pelagicus and Alopias superciliosus were previously published by Briones-Mendoza et al (see [36]).…”

Section: Family Alopiidaementioning

confidence: 99%

Catch Composition, Seasonality and Biological Aspects of Sharks Caught in the Ecuadorian Pacific

Briones-Mendoza¹,

Mejía²,

Carrasco-Puig³

2022

Preprint

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Although sharks have a fundamental role in maintaining the balance of aquatic ecosystems, exerting a great influence at lower levels, their populations are declining worldwide due, to a large extent, to overfishing. Of the 64 species registered in Ecuador, from January to December 2019, 19 species were recorded in Manta from 15455 captured individuals, with the family Carcharhinidae being the family most present in the catches (69.4%), and the most abundant species was Prionace glauca (57.9%). In the case of threatened species, such as Carcharhinus longimanus, Sphyrna lewini and Sphyrna zygaena, a greater presence of immature specimens was observed in landings, suggesting a possible existence of nursery areas. However, information on the composition and biological aspects of shark species in the Ecuadorian Pacific is very scarce. Therefore, research on the characteristics of life history (age, growth and maturity) are of utmost importance for the analysis evolution of the populations that are being exploited, especially in developing countries, where this information is very scarce, causing inadequate management of fishery resources.

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Reproductive biology aspects of Alopias pelagicus and A. superciliosus (Lamniformes: Alopiidae) in the Ecuadorian Pacific

Cited by 12 publications

References 46 publications

Genetic diversity of bigeye thresher shark (Alopias superciliosus Lowe, 1841) landed in Palabuhanratu Fishing Port, Sukabumi, West Java, Indonesia

Genetic diversity of bigeye thresher shark (Alopias superciliosus Lowe, 1841) landed in Palabuhanratu Fishing Port, Sukabumi, West Java, Indonesia

Effect of Life History on Alopias pelagicus Overexploitation Vulnerability: A Literature Review

Catch Composition, Seasonality and Biological Aspects of Sharks Caught in the Ecuadorian Pacific

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