Variation of the relationships between lengths and weights applied to 123 fish species observed at Réunion Island (Indian Ocean)

Morphometric Relationships between Length and Weight of 109 Fish Species in the Caribbean Sea (French West Indies)

“…However, this study on length-weight relationships showed that fish species diversity is higher than observed in previous studies on biological information in the Caribbean Sea (n = 37 species, Gulf of Salamanca, Columbia [30]; n = 20 species, Gulf of Salamanca [18]; n = 36 species, deep-sea fishes in Colombia [20]; n = 66 species, delta of the Atrato River, Colombia [21]; n = 22 species, freshwater fish in Venezuela [22]). Our results showed that the body length-weight relationship for all tested species was significant, which is consistent with previous studies carried out in the Northeastern Atlantic Ocean [26,31,32], Greek waters [33], the Persian Gulf [34], the Aegean Sea [35] and the Indian Ocean [27]. These results confirmed that, even with small numbers of sampled individuals, there is a significant relationship between length and weight, which allows us to switch from one morphological metric to the other and vice versa.…”

“…Morphometric relationships between length and weight were established for 109 fish species (n = 24,996 individuals). This variety of species is substantially higher than those observed in the temperate waters (i.e., Northeastern Atlantic Ocean [26], 45 species for 31,167 individuals) but closer to those observed in other warm water areas (i.e., the Gulf of Mexico [17], 174 fish species for 7503 individuals; Réunion Island (Indian Ocean) [27], 123 fish species for 10,218 individuals). This number is within the ranges of the count of fish species observed in the fish assemblage of the Caribbean arc, where between 63 and 167 fish species were reported per island [28,29].…”

Reproductive biology of 58 fish species around La Réunion Island (Western Indian Ocean): first sexual maturity and spawning period

“…Moreover, for tropical species as around La Réunion Island, there may be conservation problems due to the high temperature after fishing which result in difficulties in observation internal organs such as the gonads. Consequently, this type of study aggregating reproductive information from organ observations in the laboratory for a very large number of species is necessary to provide reference points for each species, which can be used in fisheries resource monitoring as is done for other biological parameters such as the length-weight relationship (Roos et al, 2022).…”

“…The main commercial demersal tropical fishes, along with snappers (Lutjanidae), groupers (Serranidae), emperors (Lethrinidae), carangids (Carangidae), soldierfishes (Holocentridae) and goatfishes (Mullidae) support locally important artisanal fisheries throughout the Indo-Pacific region, but quantitative assessments of these species have been limited by a lack of adequate biological and fisheries data (Newman et al, 2016;Halim et al, 2020), including around La Réunion Island (Le Manach et al, 2015). Among 123 fish species followed around La Réunion Island (Roos et al, 2022), The main objective of this study was to provide the reproductive biology information with the first sexual maturity and the spawning period for 58 mainly fish species required for the management of fisheries resources.…”