CPUE; Deep-water shrimp; Distribution; Fishing grounds; Gulf of Mexico; Penaeoid; Potential fishery resources
A systematic study to investigate the epibenthic megafauna biodiversity and potential fishing resources in the upper slope (290-1200 m depth) was carried along the Mexican Gulf of Mexico (off Tamaulipas-Yucatan). Samples were collected with a commercial shrimp trawl net (18 m mouth aperture, 4.5 cm stretched mesh, 1.5 cm stretched mesh cod-end). Fourteen species of the Aristaeidae, Penaeidae, Solenoceridae, and Benthesicymidae families were caught: Aristaeomorpha foliacea, Aristaeopsis edwardsiana, Aristeus antillensis, Hepomadus tener, Parapenaeus americanus, Penaeopsis serrata, Parapenaeus politus, Funchalia villosa, Pleoticus robustus, Hymenopenaeus debilis, Solenocera vioscai, S. necopina, S. atlantidis, and Benthoecetes bartletti. Two species were first records and two species extended its distribution to the southern Gulf of Mexico. Depth range of ten species was extended in its deeper limit. Shrimp of the Aristaeidae family were the most abundant with 6173 individuals (41%) followed by Penaeidae with 4772 organisms (31%), Solenoceridae 2914 with individuals (19%), and Benthesicymidae with 1352 specimens (9%). Seven species represented 99% of the total penaeoid catch in numbers and biomass (A. foliacea, P. serrata, P. robustus, A. antillensis, P. americanus, B. bartletti, and A. edwardsiana). Largest sizes were recorded in A. foliacea, A. edwardsiana, and P. robustus deep-water shrimp (45.57-48.09 mm mean CL). Maximum CL were also registered in these species (86.4-97.85 mm CL). Estimated penaeoid deep-water catch per unit effort (kg/h) varied from zero to18.62 kg/h. High mean CPUE values (>1.0 kg/h) were estimated at the 300-799 m depth range. Four areas of high deep-water shrimp abundance were identified in an area estimated of 60,000 kmSuperscript>2/Superscript> in the upper slope at 300-1000 m depth. The penaeoid fishery potential and possible utilization is discussed. © Springer Nature Switzerland AG 2020. All rights reserved.