No abstract

Moutopoulos D.K., Dimitriou N., Nystas T., Koutsikopoulos C. 2017. Length-girth relations of fishes from a Mediterranean lagoon system. Acta Ichthyol. Piscat. 47 (4): 397-400. Abstract. We estimated the relations between total length (TL) and opercular (G ope) and maximum (G max) girths, for the eight most representative lagoon fish species in Mesolonghi-Etolikon lagoons within 2015-2017 (June through December). The following species were studied: Chelon LGR estimates were not available. Results showed that both G ope and G max increased significantly linearly with TL for all studied species with all r 2 values being higher than 0.862. When G max values were plotted against TL for all species combined, two significant (ANCOVA, P < 0.05) length-girth relations were identified corresponding to different body shapes. The implications of girth measurements for lagoon gear selectivity estimates are also discussed.

A Hin dIII repetitive DNA family from Acrossocheilus paradoxus, a cyprinid fish endemic to Taiwan, was isolated and identified as a tandem arrangement of satellites in the genomic DNA. Cross-hybridization revealed similar patterns across fish genera and two families and suggested that this repetitive DNA is a conserved satellite sequence in fish. Forty-five monomeric repeat units of the repetitive DNA were cloned and sequenced, and found to be approximately 210 base pairs long and to have an average base composition of 52Á8% AþT. Alignment analysis by examining 45 cloned repeat DNA strands from 22 individuals from nine different streams suggested that this repetitive DNA is highly polymorphic. The variability of sequences was mainly attributable to point mutations within the sequences. Genetic distances in all repeated DNAs ranged from 0 to 0Á129 (average, 0Á06). The high levels of genotype diversity and low levels of nucleotide diversity in satellites suggest population expansion of A. paradoxus. #

Length-weight relationships are presented for five fish species from Chi-gu in southern Taiwan. At present, two of these species have no estimates in FishBase.