A study was carried out at Uchalli Lake, District Khushab on Greater Flamingos (Phoenicopterus roseus) to find their behavioral activity pattern. The hypothesis that local climatic temperature affects the wintering behavior of Greater Flamingos was tested. Data were collected for a period of 3 days in March and 10 days in April using focal animal analysis. Each day was divided into four periods (7-8 a.m., 10-11 a.m., 1-2 p.m., and 4-5 p.m.). Activity patterns included characters like feeding, resting, flying, walking, preening, aggression, and alert. Results showed that feeding was the major activity for adults (51.06%) and juveniles (56.51%). Juveniles spent more time (t = - 2.02, p < 0.05) feeding than adults. There was a highly significant difference (t = 3.20, p < 0.01) in alert between adults and juveniles across time periods. Adults spent more time alert (8.3%) than juveniles (4.49%). Only aggression and alert in adults and walking and alert in juveniles was found significantly correlated to change with temperature. The findings of the present study highlighted the need of in-depth eco-ethological study of Greater Flamingo and hydrology of wetland.
Un cariotipo de Adenoscolex oreini Fotedar, 1958 (Capingentidae), un parásito céstodo de carpas, Kashir Gaad, Schizothorax niger (Cypriniformes) ha sido estudiado por primera vez. Consiste en un conjunto de cromosomas de 20 pares de cromosomas metacéntricos, submetacéntricos y acrocéntricos (2n = 20; n = 8m+1sm+1a). Todos los pares son pequeños, miden 1,86-7,22 μm. Parece que el número de cromosomas de A. oreini es mayor en comparación con la de los miembros de la familia Caryophyllaeidae. La variación en el tamaño de los más pequeños bivalentes y otros bivalentes indican que los cromosomas somáticos mostrarán una marcada variación en la longitud del cromosoma más largo y más corto en A. oreini. Hasta ahora nadie ha emprendido los estudios citológicos de este parásito y en la presente investigación se está divulgando su número cromosómico por primera vez.
En este artículo revisamos la literatura desde 1886 hasta 2014 y el estado actual del conocimiento de los cromosomas y la citogenética de todas las especies de las familias de turbellaria, trematoda, cestoda, nematoda y acanthocephala. Datos cariológicos son analizados y tabulados para 614 especies: 115 especies de turbellaria, 278 especies de trematoda, 117 especies de cestoda, 85 especies de nematoda y 19 especies de acantocephala. Los Turbelarios no son parásitos a excepción de unas pocas posibles excepciones y muestran una reducción gradual del número básico de cromosomas. Trematodes son numerosos requiriendo apuntar hacia los esfuerzos continuos en este campo de investigación. Los datos sobre los cromosomas se carecen para cestodos acetabulados de las órdenes: Litobothriidea, Lecanicephalidea, Cathetocephalidea, Rhinebothriidea y Tetrabothriidea.
Information on reproductive biology is crucial in formulating policy to manage and conserve mahseer in Atu Suasah and Lawe Melang Rivers, Aceh, Indonesia. This research aimed to analyse and compare of mahseer biology including sex ratio, length and weight relationship, Fulton and relative condition factor and fecundity to estimate the reproductive potential of mahseer in these two rivers. The study was conducted from July to December 2019. Mahseer samples were obtained from fishermen who captured the fish using gillnet with mesh size 1.5-2.0 inch. The specimens collected were placed in a coolbox and transported to the Aquatic Resources Management Department of IPB University in Bogor for further analysis. Regression, chi-square, Mann Whitney test and t-test were applied to analyze reproductive biology parameters. There was no significant between-site difference in the reproductive parameters of mahseer from Atu Suasah and Lawe Melang Rivers. The sex ratio was balanced. The growth pattern was allometric negative and the Fulton condition remained stable over the six month study period. Mahseer in the 610-710 mm length class made the largest contribution to total egg production. Management and conservation of this fish should include the designation of a reservation area to mantain larval production as the source of recruits.
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