Ebonyi River basin of south east Nigeria is home to the freshwater crab Potamon ebonyicum, which are consumed indiscriminately by inhabitants and tourists. Bulk of the crab meat is obtained by crabbing. A preliminary survey of pathogenic bacteria associated with vulnerable morphological part of the crab species was carried out in the basin. Bacteria were isolated from abdominal flaps of the mal...

and highly successful decapod group, their osmoregulatory capability has been studied mainly from the whole-animal perspective, and little information is available concerning their physiological mechanisms of osmotic and ionic regulation. Like the diadromous crabs that migrate between sea water and fresh water during their life cycle, the hololimnetic Brachyura also maintain large, outwardly di...

Phylogenies based on similarity of standard karyotypes of representatives of 17 of the 18 stenodermine (Stenoderminae: Phyllostomatidae) genera have been pub-are based on the supposition that the primitive karyotype for the subfamily had a 2n = 30 or 32 and a fundamental number of 56-60. The phylogeny of Gardner (1977:313) is based on the assumption that the primitive karyotype for the subfamil...

Davis, Breizt L . , and Robert J. Baker (Dept. Biology, and T h e Mliseum, Texas Tech Uniuersity, Lubbock, Texas) 1974. Morplzometrics, Euoltition, and Cytotaronomy of Mainlatld Bats of the Gentis hlacrotus (Chiroptera: Pl~~llloston~ati~lae). Slyst. Zool. 23:2639.-Chromosoma1 data reveal the existence of two mainland species of Macrotus that are parapatric in distribution: -Individuals can be i...

The effect of serotonin (5-hydroxytryptamine, 5-HT) injection on the ovarian maturation and spawning of wild Penaeus monodon was investigated. The neurotransmitter was evaluated at 20 μg g-1 body weight (b.w) and 50 μg g-1 (b.w) applied at day 2, 12 and 22. The effect was compared against a control group, which received the injection of the sterile vehicle solution (NaCl 0.85%), and an unilater...