New Recorded of Saltwater Crocodile Crocodylus porosus Schneider, 1801 from East Coast Mangrove Ecosystem in Surabaya, East Jawa, Indonesia

A single specimen of saltwater crocodile Crocodylus porosus Schneider, 1801 (1.50 cm in length) was captured and photographed by a local fisherman by gill net at fishpond around mangrove ecosystem of east coast Surabaya on December 2020. The location where the estuarine crocodile caught is an important wetland area in Surabaya with an excellent mangrove cover. Wonorejo mangrove location is about 10 km from the centre of Surabaya, the second-largest city in Indonesia. This finding is considered as a first reported of C. porosus in Surabaya, and at the same time is proof of the importance of the mangrove area on the east coast of Surabaya as a habitat for wildlife that must be conserved appropriately. Routine monitoring of mangrove areas, including their wildlife, is essential so that they are not displaced by the development of the city which changes the land function to become a residential area.

Catch Composition of Set Net Fisheries during Normal Season in Sungai Sembilang Waters, Selangor, Malaysia

Highlight ResearchThe Set Net was identified and recorded.Length and weight of the catch of set net was analyzed. AbstractSet net fisheries are made according to traditional fishing gears method in the coastal waters of Sungai Sembilang, Selangor, Peninsular Malaysia. These fisheries system are the passive structure of gear used to catch fish that swim in shallow water with muddy substrate. This study focused on determining the species variety and the possible future of set net fisheries in Sungai Sembilang. Catch composition of set net was investigated based on the catch data during July to December 2020 and continued from January to February 2021. The catch data was recorded by a research assistant on site during fishing season. The data consist of species, length and weight of all catches recorded. Total catch of 60 fish species belonging to 23 families were captured during this study period. Ariidae (31.73%), Clupeidae (11.56%), and Scatophagidae (7.96%) were determined as dominant families caught this set net. The total dominant catch amount of species Plicofollis argyropleuron (18.71%), Nemapteryx caelata (9.96%), and Anodontostoma chacunda (8.92%) compromised 37.6% of the total catch. This type of fishing gear can be used by local fisherman to catch fishes and can prevent trawl net from come closer to the shore. This study would provide some general useful information about the status of set net fisheries as well as the species abundance caught from the set net.

First inland record of Bull shark Carcharhinus leucas (Müller & Henle, 1839) (Carcharhiniformes: Carcharhinidae) in Celebes, Indonesia

A single specimen (c. 86.2 cm) juvenile of Bull shark Carcharhinus leucas (Müller & Henle, 1839) was captured and photographed by local fisherman using a casting net on 13 February 2018 in Pangkajene River, about 16 km inland, Pangkajene District, South Celebes, Indonesia. This finding is considered as a first inland record of C. leucas in Celebes, and fourth inland records in Indonesia after Papua, Sumatra and Borneo. Monitoring is needed to asses the possibility of Celebes as a migration route and breeding ground of C. leucas.

Occurrence of the largetooth sawfish Pristis pristis (Linneaus, 1758) in northern Peru

The largetooth sawfish (Pristis pristis) is listed as Critically Endangered on the IUCN Red List (Kyne et al. 2013). This species has been recorded in the Eastern Tropical Pacific, where its range has been described as extending from Mazatlan, Mexico, to northern Peru (Chirichigno & Cornejo 2001). Recent research efforts suggest that largetooth sawfish are now extremely rare or locally extinct on Mexico’s Pacific coast (Bonfil et al. 2018). There is no current information on the status of largetooth sawfish in Panama or Colombia; the most recent record of a largetooth sawfish captured on Colombia’s Pacific coast occurred in 2007 (Chasqui et al. 2017). In Ecuador, the species had been considered extirpated. However, in 2014, a large largetooth sawfish was captured by local fisherman in southern Ecuador, taken to the fishing port of Salinas and then released by the environmental agency (Barriga 2012; Rosas-Luis 2014). In Peru, recent reports of largetooth sawfish have been rare, but two captures of largetooth sawfish by fishermen (2014 and 2015) in northern Peru were reported (Mendoza et al. 2017). This confirms that the species is still occasionally encountered in this region.

Occurrence of parasitic and bacterial diseases in Thai freshwater fish

The present study was aimed to investigate the occurrence of parasitic and bacterial diseases in some freshwater fish in NongBo reservoir, Maha Sarakham Province. The sampling was randomly collect from three sites by gillnets, bag nets and cast nets from the local fisherman during October 2015 to September 2016. A total of eight freshwater fish species were identified namely Oreochromis niloticus, Hampala dispar, Pristolepis fasciata, Trichopodus pectoralis, Anabas testudineus, Oxyeleotris marmorata, Channa striata and Clarias batrachus. The parasitic diseases found on the sampled fish specied were external parasites such as Trichodina sp., Dactylogyrus sp. and Digenea gen.sp. The bacterial diseases identified were Aeromonas hydrophila, Acinetobacter baumannii, Plesiomonas shigelloides, Serratia odorifera and Staphylococcus epidermis. The dominant species of bacterium was Aeromonas hydrophila. This study revealed that the natural fish stock could be risk from the fish pathogens both parasites and bacteria. Keywords: Reservoir, external parasite, fish pathogens.

Food and feeding behaviours of Spotfin Swamp Barb Puntius sophore (Hamilton, 1822) of Singhiya River, Biratnagar

The present work attempt to present a novel approach about the food and feeding habits of Puntius sophore collected from Singhiya River, Biratnagar. For the study 120 specimens were collected on the monthly basis from March to August 2019, direct from the river with the help of local fisherman. On the basis of percentage of occurrence of gut content analysis the most preferred food item was Green algae (40.6%) followed by diatoms (16.10%), crustaceans (13.50%), protozoan (9.20%), detritus and debris (8.40%), insect larva (7.70%) and rotifers (4.50%). Relative gut length was the lowest at size 4.4-5.1 cm SL and the highest value at size 9.3-10 cm SL. Gastro somatic index was highest peak at the size of 4.4-5.1 cm SL, which indicate the voracious nature of fish at smaller size. The standard length and body weight show a positively significant with alimentary canal length (r=0.878) and alimentary canal weight (r=0.86.4), respectively. The food and feeding behavior of this fish showed that it is omnivores in nature.

HISTORICAL APPROACH OF THE FISH SPECIES COMPOSITION IN ARROYO MORENO, VERACRUZ, MEXICO

<p>Arroyo Moreno (AM) is an estuarine water flow located between Boca del Río and Medellin municipalities from Veracruz State; although this estuarine habitat is situated in a state natural reserve, their environmental conditions had been altered in last decades by anthropogenic activities, which had caused changes on biotic communities including fishes. The aim of this contribution was to describe the temporal variation of fish species composition from Arroyo Moreno; an updated list of fish species was compiled for this estuarine channel, this list was made with ethnographic information provided by local fisherman using surveys, fish species catalogues, previous publications and complemented with cast net samplings. Sixty-two fish species were recorded, of these 18 were collected directly for us, another 41 species were identified by surveyed fishermen; the most abundant ecological guilds were marine temporary, freshwater temporary, and marine migrant species. With the historical fishermen’s information was inferred than both fish species richness, abundance and size had diminished noticeably in commercial fish species mainly, this outcome was related by the fishermen to the use of estuarine channel as drainage attributed to urban development in the zone.</p>

First record of Viminella sp. (Anthozoa: Alcyonacea: Ellisellidae) in the Persian Gulf

This paper presents the first record ofViminellaGray 1870 from the Persian Gulf. This genus has a global distribution and its largest distribution is in the Indo-Pacific region. A single specimen was collected by a local fisherman from south Hengam Island (the north Persian Gulf) from 60-70 m depth. Colony morphology characteristics were examined by stereomicroscope and optical microscope. Descriptions of the colony and other taxonomic characteristics are provided. The colony is unbranched with a height of 12 cm and its basal diameter is approximately 1.63 mm. The sclerites of the coenenchyme comprise a variety of symmetrical double heads and capstan-like forms (0.05-0.11 mm). In the wall of calyces, slightly elongated double heads, capstans and spindles (about 0.08-0.19 mm) are present. Our finding extends the known geographical distribution of this genus in the Indo-Pacific region to the Persian Gulf.

A brief report on ichthyofaunal diversity of Dewmai khola of Ilam district, Nepal

Fish diversity of Nepal has been poorly studied or understood relative to other fauna, so a lot of study is still required to have a better fish diversity profile. We investigated ichthyofaunal diversity on one of the unexplored rivers, Dewmai Khola which lies in mid-hill region of Ilam district in eastern Nepal. Fishes were collected from three sampling sites in day time by using a cast net with the help of local fisherman. The field visits were performed from December2015 to September 2016. A total of 16 fish species belonging to 3 orders, 6 families and 11genera have been recorded. The Cypriniformes was the dominant order represented by 3families: 1) Cyprinidae with 7 species (Cirrhinus mrigala, Barilius barila, B. bendelisis, Bengalaelanga, Danio aequipinnatus, Schizothoraichthys labiatus and Garra gotyla), 2) Cobitidae with5 species (Schistura multifasciatus, S. horai, S. scaturigina, S. savona and S. rupecula) and3) Psilorhynchidae with a single species Psilorhynchus pseudecheneis. The Perciformes was represented by two families with a single species in each: Belontidae (Colisa fasciatus) and Channidae (Channa stewartii). The Siluriformes was represented by a single family Sisoridae with a single species Glyptothorax pectinopterus.