#morphometry

The freshwater garfish, Xenentodon cancila (Hamilton, 1822), is a needlefish species found in freshwater and brackish areas in South and Southeast Asia. This fish is a regular aquarium favourite. While these fish are linked to the marine needlefish known as gar or garpike in Europe, they are far more distantly connected to other fishes known as gars. For the first time, Trichodina cancilae Asmat, 2001 was discovered parasitizing the gills of a freshwater fish known as Kokila in Assam, India (X. cancila Hamilton, 1822). T. cancilae morphology and morphometrics are discussed here, along with a comparison of the same species found in West Bengal and Bangladesh. This Trichodina species lies within the morphometric range and shares the original population's overall look of the sticky disc.

The worldwide-distributed well-known piscian helminth parasitic fauna viz., nematodes, trematodes and cestodes were collected from listed sampling stations of Uttar Pradesh, India during 2017-18 to 2018-19. The fieldwork report summarizes the computed recorded data of Incidence, Intensity, Density and Index of infection of helminth parasites from freshwater fishes. In this survey, biostatistical analysis with population dynamics of Caryophyllidae has observed in local freshwater fish species of different regions of the Uttar Pradesh, India. the present study deals with the annual cyclic seasonal survey of helminth parasites with the paratenic host. For this study, the freshwater fishes were collected from different districts and tehsils of Uttar Pradesh state viz., Garhmukteshwar, Anoopshahr, Agra, Etawah, Kanpur, Prayagraj, Banaras, Sultanpur. Out of 400 freshwater fishes, 153 was found infected with helminth parasites in which nematodes, trematodes and cestodes were observed in an annual cycle of seasonal spectrum. During this survey period, a total of four types of piscian parasites identified from different fish species after the microscopic investigation in the laboratory followed by the key standards and measurement of classification. Physical disadvantages checked on the host fish from parasitic infestation during the lab's microscopic and morphometrical investigation. Additional parasites also collected and preserved for further investigation. These parasites species were classified and distributed in different higher taxa viz., Platyhelminthes- Trematoda, Cestoda, Aschelminthes- Nematoda and Acanthocephala. Morphological and morphometrical study of parasites is more helpful to identify different species of piscian parasites with external form. During the present investigation, the Influence of seasons on parasitic infection was recorded within three seasons as Rainy, Winter and Summer. Regarding the    parasitic diversity and population dynamics study has been carried out to compare each other. This study highlights the details of the biostatistical configuration and morpho-taxonomical analysis of endoparasitic organisms infecting freshwater fishes along with listed sampling stations of Uttar Pradesh state. The result suggests that assemblages of helminth parasites in freshwater fish are not random collections of locally available species, but rather structured clusters of larval parasites that travel together along common transmission pathways.

Abstract

Morphometric parameters, length-weight relationship and condition factor of indigenous fish belong to Devario genus, with great export and economic potential was evaluated from three different river systems of South Kerala, viz, Neyyar, Vamanapuram and Karamana river system. Since the taxonomy and nomenclature of many Cyprinids are being modified, morphometric evaluation of any Cyprinid is significant to reduce the ambiguity in taxonomy and systematics especially to delineate and document the population or habitat/environmental differences within species. A total of 19 morphometric parameters including length and weight of D. species was recorded from three river systems and compared statistically. Principal Component Analysis (PCA) was employed to delineate the habitat difference in the same species and elucidated head length as first principal component followed by snout length and pre orbital length were identified as second principal component and body depth as third principal component to distinguish three populations of the same species. Again morphometric comparison using ANOVA revealed that snout length, eye diameter and pre orbital length and pectoral fin length differed significantly between habitats within same species. Length weight relationship showed a negative allometric growth between rivers and condition factor showed fishes were in good condition with Fulton condition factor above unity.

Get The Original Articles in Source: Morphometric evaluation of an indigenous fish belong to genus Devario from three river systems of South Kerala

Journal Name: Journal of Biodiversity and Environmental Sciences (JBES)