Despite the ubiquity of obligate mutualisms on coral reef ecosystems, little is known about the evolution of many participating species. The shrimp gobies, known primarily from the coral reef habitats of the Indo-Pacific, are small benthic fishes that participate in a remarkable mutualism with alpheid shrimp. In this mutualism, the shrimp build and maintain a burrow that is guarded by the goby,...

The kinetic characteristic (Km) of cholinesterase from the crab Chasmagnathus granulata, the shrimp Farfantepenaeus paulensis and the fish Odontesthes bonaeriensis were compared and correlated with the anticholinesterasic effect of eserine (physostigmine). For the crustaceans, the estimated Km values were about 5-8 times higher than that estimated for the fish (0.04 mM). In the crab and the shr...

The Ponto-Caspian mysid shrimp Hemimysis anomala was found in Ireland for the first time in April 2008. During 2009 it was found throughout most of the Shannon River Navigation (~250km) occurring in swarms at estimated densities of ~6 per litre in shallows and in lower densities at depths of ~20m where its distribution overlaps with the native Mysis salemaai. Broods were found from March to Sep...

This Fisheries Science Partnership project was developed to estimate the survival of rays, which are caught commercially in a target trawl fishery in the Bristol Channel, and subsequently discarded. The study was proposed by the NFFO and categorized by Defra and Cefas as priority for support. All ray and skate species are commonly marketed as skate. The status of several skate and ray stocks in...

with regard to bycatch problem, this is the first study of the shrimp trawl bycatch in different depth variation in hormuzgan coastal waters. samples were collected during shrimp season in october 2011 and november 2012. the study area was divided into two regions: hormuz-keshtisoukhte (56°, 27ʹ e/27°, 07ʹ n) to (56°, 18ʹ e/27°, 06ʹ n) and keshtisoukhte-toola (56°, 18ʹ e/27°, 06ʹ n) to (55°, 58...

This paper analyzes the pattern of reproduction and recruitment pink shrimp Penaeus subtilis in Amazon River continental shelf. Biostatistics samples obtained on board industrial fishing vessels estuaries northeastern state Para were use analysis as well monthly data landings processed by commercial category. The sex ratio, for female male respectively, was 61% to 39%, fishery, 54% 46%, estuary...

During the 1960s and 1970s, a significant groundfish fishery existed in the Gulf of Mexico. There were about 50 vessels in the fishery which targeted a groundfish complex that consisted of over 170 species, dominant of which were croaker, spot, seatrout, cutlassfish, sea catfish, porgies, perch, drums, hake, and butterfish. The primary directed fishery was for the pet food, harvesting 50,000 to...

There are about 100 penaeid shrimp species in China’s coastal waters, of which a dozen Penaeus spp. and Metapenaeus spp. have commercial value (Liu 1989a). The main species cultured in China are Penaeus chinensis, P. monodon, P. japonicus, P. merguinsis and P. penicillatus. Chinese shrimp farms are distributed along almost 18,000 km of coastline from Hainan Province in the tropics to Liaoning P...

Length-based analyses were conducted to assess the stock of the green tiger shrimp Penaeus semisulcatus. Monthly carapace length frequency data were collected from commercial catches at two main landing sites on the Yemeni Red Sea coast for eight months. Growth parameters, mortalities, exploitation rate and yield per recruit were estimated for this species in this area. The estimated growth par...