| Title: |
Length–Weight Relationships of 68 Mesopelagic Fish Species From a Subtropical Ocean Basin. |
| Authors: |
Areford, Ian M.; Trimble, Sidney R.; Cook, April B.; Sutton, Tracey T.; Milligan, Rosanna J.; Amarasinghe, Upali S. |
| Source: |
Journal of Applied Ichthyology; 11/17/2025, Vol. 2025, p1-19, 19p |
| Subject Terms: |
FISH growth; BIOMASS estimation; PELAGIC fishes; COMPOSITION of water |
| Geographic Terms: |
GULF of Mexico |
| Abstract: |
Wet‐weight‐ and dry‐weight‐derived length–weight relationships were estimated for 68 species of mesopelagic fishes found throughout the Gulf of Mexico, 59 of which are new for the region and 28 are new globally. The length–weight relationships obtained were of good fit, with 92% of models having R2 values above 0.90. Isometric and positive allometric growth were the most common growth models observed, which agrees with similar studies on mesopelagic fishes across various other regions. Allometric growth parameters (b) were largely within the expected range for fishes, with 76% of estimated growth parameters falling within the range 2.5–3.5. Estimates of growth form were variable across weight types and taxa, with 28 species displaying a different growth form depending on the weight type used. The shifts in growth form observed in this study were likely related to water content as the examination of the relationship between length and water content found that this relationship was significant in 22 of 28 species that exhibited a shift in growth form. Variations in relative water content in relation to length were hypothesized to reflect ontogenetic changes in body composition, driven by shifts in vertical distribution and diel vertical migration behavior. Overall, the present study represents one of the largest assemblies of length–weight relationships of mesopelagic fishes to date and will aid in regional biomass estimations of mesopelagic fishes in the Gulf of Mexico. [ABSTRACT FROM AUTHOR] |
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| Database: |
Complementary Index |