Skipjack tuna (Katsuwonus pelamis) has high economic value and opportunities for local export market demand. The present study aims to investigate growth exploitation status of the resource. Data collection was carried out in April-August 2021 by collecting catch data from fishermen at four fish landing sites Manokwari. caught were waters around size skipjack measured ranged between 260 mm 760 ...

Abstract The West Java southern waters - Banten is among the skipjack tuna Katsiuwonus Pelamis distribution areas. It well known that potential influenced by environmental circumstances of waters. This study was performed to establish in waters– support management program marine fishery resources. data used consisted catch position, sea surface temperature, and chlorophyll-a concentrations from...

Bird flocks associated with dolphins in the eastern tropical Pacific are described from observations obtained during eight cruises that took place from January to March of 1976, 1977, 1979, and 1980. In the northern tropical waters between latitudes 5”N and 30”N, 43% to 53% of bird flocks co-occurred with dolphins. In equatorial and southern subtropical waters between latitudes 5”N to 12”s and ...

E-mail address (for F. Hazin): [email protected] depths between 5 and 10 m. Bottom longlines consisted of a multifilament mainline (6 mm in diameter) with up to 100 secondary lines, each approx. 5 m in length and constructed from 3-mm diameter monofilament attached to a wire snood (1 m in length). Types of hooks varied among brands, but rela­ tive sizes (i.e. 9/0) remained similar.The mai...

We develop an advection-diffusion size-structured fish population dynamics model and apply it to simulate the skipjack tuna population in the Indian Ocean. The model is fully spatialized, and movements are parameterized with oceanographical and biological data; thus it naturally reacts to environment changes. We first formulate an initial-boundary value problem and prove existence of a unique p...

Indonesian dried-salted fish (DSF) was produced from skipjack tuna by soaking the flesh in 15% NaCl (DSF D or 25% NaCl (DSF II). The DSFs were then hydrolyzed by trypsin, chymotrypsin, Pronase E, and pepsin. Angiotensin I-conyerting enzyme (ACE) inhibitory actiyity was measured. The pepsin digest showed the highest inhibitory activity (IC,,; O.63 mg proteinlml). DSF II hydrolysate had higher in...

Skipjack tuna are globally distributed in tropical and temperate seas but little is known about their fine-scale diving patterns how fish size (or) maturity influences off eastern Taiwan. A total of 211 immature skipjack (36 e 47 FL cm) the study were caught by trolling near subsurface aggregating devices (FADs) Green Island (southeastern Taiwan) tagged with Lotek LAT-2910 archival tags. The lo...

Tracking migration of highly migratory marine fish using isotope analysis (iso-logging) has become a promising tool in recent years. However, application this method is often hampered by the lack essential information such as spatial variations ratios across habitats (isoscapes) and ontogenetic shifts target animals. Here, we test utility geostatistical to generate isoscapes δ 13 C 15 N western...

Skipjack is the secret key encryption algorithm developed by the NSA for the Clipper chip and Fortezza PC card. It uses an 80-bit key, 128 table lookup operations, and 320 XOR operations to map a 64-bit plaintext into a 64-bit ciphertext in 32 rounds. This paper describes an eecient attack on a variant, which we call Skipjack-3XOR (Skipjack minus 3 XORs). The only diierence between Skipjack and...

We investigated the associative behavior of skipjack (Katsuwonus pelamis), yellowfin (Thunnus albacares), and bigeye (T. obsesus) tuna within multi-species aggregations associated with drifting fish aggregating devices (dFADs) in two different regions western Indian Ocean: Mozambique Channel Seychelles, using acoustic telemetry. documented residence absence times tunas at temporal scales (coars...