A5014505321- Fish Biology and Ecology Studies
- Echinoderm biology and ecology
- Mercury impact and mitigation studies
- Aquaculture Nutrition and Growth
- Aquatic life and conservation
- Heavy metals in environment
- Marine Bivalve and Aquaculture Studies
- Marine and coastal plant biology
- Fish Ecology and Management Studies
- Microplastics and Plastic Pollution
- Marine animal studies overview
- Marine Invertebrate Physiology and Ecology
- Animal Diversity and Health Studies
- Heavy Metals in Plants
- Marine and environmental studies
- Marine and fisheries research
- Heavy Metal Exposure and Toxicity
- Seaweed-derived Bioactive Compounds
- Recycling and Waste Management Techniques
- Marine Biology and Ecology Research
- Marine Ecology and Invasive Species
- Identification and Quantification in Food
- Parasite Biology and Host Interactions
- Environmental Toxicology and Ecotoxicology
- Aquatic Invertebrate Ecology and Behavior
University of Karachi
2014-2025
Indus Resource Centre
2022-2025
Sinop University
2018-2024
Temuco Catholic University
2022
One of the essential factors to be addressed in development aquaculture is feeding regime. This study was investigated assess effects rate on growth performance, feed utilization, chemical body composition survival rate, cannibalism and morphological indices Asian Seabass, Lates calcarifer. Intended for trial, one hundred forty sea bass individuals with an average weight 5.47 ± 0.11 g were randomly distributed 4 concrete tanks (914 cm × 183 122 cm) each; length width depth) volume 18,399 L,...
A 70-day rearing trial was done to determine the optimal frequency of feeding on growth performance (GP), feed conversion rate (FCR), cannibalism, survival (SR), body chemical composition and economic efficiency Asian sea bass. This study tested four different treatments frequencies (FF), once (T1), twice (T2), three times (T3), (T4) per day. An average initial weight bass fry 0.2 g (SD = ±0.12) were stocked 10 individuals m3 (9.14 m × 1.82 1.22 m, L W H; water depth 0.61 m) with two...
This paper provides the first record of Holothuria (Selenkothuria) parva Krauss (in Lamper, 1885) from intertidal zone in Balochistan, Pakistan, on northern shores Arabian Sea. We present a comprehensive description this known species, illustrating its gross morphological characters and recording habitat expanding distribution now covering western coastline Pakistan also Pakistan. Identified specimens are deposited Marine Reference Collection Resource Centre, University Karachi (Cat. no....
This study presents a detailed morphology and taxonomic of Polysiphonia subtilissima collected from Abdul Rehman Goth, Karachi coast, Pakistan. is filamentous heterotrichous red algae, characterized by its branching structures attachment mechanisms. P. notable for broad salinity tolerance wide distribution across marine freshwater ecosystems. research provides an in-depth examination the internal external subtilissima, contributing to systematic documenting first recorded occurrence in...
Microplastics (MPs) are posing an increasing threat to the marine environment, affecting ecosystems and potential risks human health through food chain. This study aims investigate MP contamination of Holothuria (Thymiosycia) arenicola Semper, 1868, pardalis Selenka, 1867, sediments seawater from Buleji coasts Karachi, Pakistan. The was determined in different body parts sea cucumber species both sediment samples were contaminated with microplastics. results show that H. contains more...
The present study aimed to estimate the growth pattern through length-weight relationships (LWRs), condition (Fulton's factor, KF) and prey-predator status relative weight (WR) of 9 fish species e.g., Netuma thalassina, Epinephelus coioides, Acanthopagrus berda, latus, bifasciatus, Parastromateus niger, Aluterus monoceros, Sphyraena putnamae, Lates calcarifer belong 7 families from Arabian Sea Pakistan. Occasionally samples were collected marine waters connected Baluchistan Sindh province...
Plastic material dominates our life and accordingly, it the environment as a pollutant. Pakistan coasts are facing with plastic pollution problem like rest of world. The number types microplastics found in sea water sediment samples from 25 locations along Arabian Sea coast were explored this study. results present study show that region is under high microplastics. Microplastic abundance seawater was mean 582.12±246.14 particle. L-1 987.40±617.06 particle.kg-1 dry sediment. concentration...
The fishery, biology, growth and stock structure of Euthynnus affinis is studied in detail. Hooks lines, gillnets purse seines are the major equipment used to exploit fish. Fisheries sustained mainly by 1–2 year old fishes (34–50 cm). Spawning was observed around with peaks during July–August November–January. length–weight relationship 0.0254 L2.889 no significant difference between males females. Age estimated using length based methods. maximum sustainable yield higher than average annual...
Objective: To determine heavy metal concentrations in holothurians (Holothuria arenicola, Holothuria pardalis, verrucosa, atra, Ohshimella ehrenbergii, cinerascens, Stolus buccalis and leucospilota), sediments sea water samples from both Buleji Sunehri coasts bordering Northern Arabian Sea during January to December 2014 assess the level of bioaccumulation using factors.Methods: Fe, Mn, Zn, Cu, Cd Pb levels were determined by Perkin Elmer AAnalyst 700 Atomic Absorption...
Length-weight relationships and condition assessment are a common practice in fisheries analyses; however, such information is unknown for most sea cucumber species. The present study investigated length-weight relative indices of four commercially important cucumbers: Holothuria arenicola, atra, pardalis verrucosa. Additionally, the seasonal variations obtained between three climatic seasons (pre-monsoon, monsoon post-monsoon) were analyzed. results showed that species grow allometrically,...
Anthropogenic activities are the major source of chemical pollutants including heavy metals in coastal ecosystem which may accumulate aquatic organisms through food web. Metal contamination marine fish pose serious threat to human health. This study deals with health risks metal accumulation from Sarda orientalis consumption. The quantities were investigated muscle, gills, and liver striped bonito commercial landings Karachi Fish Harbor, Pakistan (northern Arabian Sea). Risk for was...
In the present study, Scomberomorus commerson was collected during period 2006-2011 in order to provide information on concentrations of eight heavy metals this marine species commonly consumed by population and have knowledge whether these levels may constitute a hazard consumers. Liver showed high tissues organs. Fe is most accumulated all The highest mean concentration (608.93+113.22 µg/g), Mn (9.79+4.22 Cu (38.57+16.62 Zn (53.25+26.50 Ni (3.22+1.13 Pb (1.20+0.64 Cd (2.03+0.91 µg/g) Cr...
Salinity is one of the most critical environmental parameters regarding fish physiology, modifying food intake and growth performance in many species. The present study has investigated effects different salinity levels on performance, feeding survival Asian seabass Lates calcarifer juveniles. juveniles were reared at 0 (T1), 5 (T2), 22 (T3), 36 (T4), 42 (T5) ppt salinity. Approximately eight hundred thirty individuals with an average weight 1.24±0.52 g randomly distributed (166 fish/Tank)...
Microplastics are found in all aquatic environments, and they can have several negative impacts on marine life. In this study, the distribution of microplastics sediment organs (gut, respiratory tree, tentacles) sea cucumber (Holothuria leucospilota) collected from Mubarak Village Cape Monze Karachi coast Pakistan were investigated. The microplastic amount different H. leucospilota was as 15.3-40.45 pieces/individual gut, 15.45-23.9 8.9-9.55 tentacles. samples 57.40-129.35 pieces/kg. Fibers...
Nowadays metal bioaccumulation in holothuroids is increasing and a cause of worry owing to toxicity.In the present study concentrations mercury (Hg) were measured (Holothuria (Thymiosycia) arenicola Semper, 1868, Holothuria (Lessonothuria) pardalis Selenka, 1867, verrucosa 1867 (Halodeima) atra Jaeger, 1833) collected during different seasons (pre-monsoon, monsoon, post-monsoon) 2015 at Buleji Sunehri coasts Karachi, Pakistan.Hg tentacles higher than those muscle, tentacle gut tissues...
Two specimens of a species herein identified as Holothuria (Lessonothuria) insignis Ludwig, 1875 and single specimen lineata 1875, were collected from the intertidal zone at low tide two coastal localities in Karachi (Buleji Sunahri). This paper briefly documents their morphology habitat characteristics formally resurrects H. (L.) synonymy pardalis Selenka, 1867, based on observations ossicles assemblage deduced current material, syntype, some material NHMUK (Natural History Museum,UK),...
Microplastics are one of the major pollution problems nowadays, have been found in both marine environments and various fish species worldwide. In this study, presence microplastics digestive systems gills 6 from Scombridae family on coast Karachi Pakistan was investigated. A total 336 were examined for microplastic systems. detected 11.11%-19.51% 58.62%-85.71% individuals, respectively. The number varied 0.19 to 1.12 items.ind-1 system 1.5 7.04 gill. Fibre dominant (98.67-99.17%) (100%)....
Concentrations of heavy metals Cd, Fe, Pb, Cu, Zn, Ni, Co, Cr and Mn in muscles, liver, kidney
 gills marine native commercial fish Chacunda gizzard shad Anodontostoma chacunda
 collected from Karachi harbour were determined to conduct a health risk assessment for people
 by the Atomic Absorption Spectrophotometer. The obtained results expressed mg/kg dry
 weight. Results showed that Fe Zn concentrations most abundant among all tissues
 whereas Cd Pb levels lowest....