A note on the ribbonfish Trichiurus auriga

The ribbonfishes belonging to the family Trichiuridae is a major fishery resource of India. Three species under the genus Trichiurus namely T. lepturus, T. auriga and T. gangeticus are reported from India. Of these, the largehead hairtail T. lepturus commonly grows to 100 cm in size and has high market demand. T. auriga (Pearly hairtail) is a small sized species (maximum size < 40 cm) and reported to occur in huge shoals in the upper slope regions. With little market demand for consumption due to its small size, whenever caught they are most likely to be diverted to fish meal plants. There is wide spread concern on the large scale capture of juvenile fishes which adversely affects the resources

Leader humility and knowledge sharing intentions: A serial mediation model

Purpose: This paper examines the influence of leader humility on knowledge sharing intention. Drawing on social exchange theory (SET), we test the direct and indirect mechanisms to explain the influence leader humility has on knowledge sharing intention. Design/Methodology/Approach: A two-wave, time-lagged field study was conducted. We surveyed 252 professional employees from Australia. Findings: Results show a significant direct, positive association between leader humility and knowledge sharing intention. While leader humility had a direct, positive association with affective trust in supervisor and work engagement, it did not directly impact on organizational citizenship behaviors directed toward the individual (OCB-I). There were three SET-related, serial mediators in the relationship between leader humility and knowledge sharing intention. These were affective trust, work engagement, and OCB-I. Research Limitations/Implications: Future studies should collect multi-source data such as peers’ or supervisors’ ratings of the focal respondents’ work engagement, OCB-I, and knowledge sharing behaviors to augment single-source data. Future studies could adopt an affect theory of social exchange to further explore the relationships tested in this study. Originality/Value: This study contributes to the affect SET and knowledge management literature on how leadership behaviors impact the intention to share knowledge. Our study highlights the preference of the willingness to share knowledge with their co-workers is mediated by affective trust in their immediate supervisors, work engagement, and OCB-I that are equally important as treating their subordinates with humility

New records of Champsodon nudivittis and Champsodon snyderi (Fam: Champsodontidae) from the Indian EEZ

Champsodon genus belonging to the family Champsodontidae are constituted by bottom dwelling fishes at great depths (400 – 1000 m) in the oceans and are commonly referred to as gapers. These are characterized by a large head and mouth, an elongate compressed body densely covered with small denticulate scales, pre-opercle with a prominent postero-ventral spine bearing small serrations on the ventral side, a short spinous dorsal fin, small pectoral fins, unusually large pelvic fins and a complex acoustic-lateralis system that consists of two horizontal lateral lines interconnected by vertical rows of sensory papillae

Snake mackerel fishery of the Tuticorin coast of Gulf of Mannar with emphasis on population characteristics of the sackfish, Neoepinnula orientalis (Gilchrist & von Bonde 1924)

Snake mackerels form by-catch in deep sea trawls and gillnets with an annual average production of 106 t during 2004 - 2006 in Tuticorin area. Fishery occurred almost round the year with peak during November - March. Fishery and biology of the dominant species, Neoepinnula orientalis was monitored during 2004 - 2005. Peak spawning and recruitment of the species was during December - March period. Growth parameters, L∝ and K are estimated as 31.6 cm and 0.68/year respectively. K value indicates that fish growth is relatively slow. Natural mortality estimate (M) is 1.38, total mortality (Z) 1.59 and fishing mortality (F) 0.21. The exploitation ratio (E) is low being 0.132. These estimates indicate that the stock is at its early stage of exploitation and have large scope for future commercial exploitation. As a preliminary step in this direction, the extent of stock abundance, biomass and distribution of the stock needs to be assessed. Being a slow growing species in cold habitat, considerably long time is required for stock multiplication. These factors have to be taken into consideration while planning for exploitation of snake mackerels in future

New record of the gaper Champsodon nudivittis (Ogilby, 1895) from the deep waters of north-east Arabian Sea with notes on its biology

The gaper Champsodon nudivittis is reported as the first record of the species in the northern Arabian Sea where it was caught at 280 -390 m depths between 19 and 210 N latitudes. Study confirmed the presence of a sizeable self-regenerating population of C. nudivittis in the northern Arabian Sea comprising of reproductively active, mature fish, which was believed to be absent so far. The size range of the specimens caught was 55-105 mm with modal size 75-85 mm. Females were significantly dominant (p 60 mm size groups, with a sex ratio of 1:4.3. Catch was dominated by mature females, with an estimated Lm of 74 mm. Mean absolute fecundity was 740±156 eggs and mean relative fecundity 205±97 eggs per gram body weight. It is a carnivorous predator, feeding on young of several commercially important fishery resources such as the pandalid shrimps, sergestid shrimps (Acetes) and the Indian codlet Bregmaceros spp. found in the northern Arabian Sea

Note on a deformed Indian mackerel

An Indian mackerel (Rastrelliger kanagurta) withdeformed snout was collected from the landings atKalamukku fish landing centre on 30.12.2015. Out of50 specimens of R. kanagurta, collected for thebiological studies, only one fish was observed with adeformed snout

Spin-Peierls instability in a quantum spin chain with Dzyaloshinskii-Moriya interaction

We analysed the ground state energy of some dimerized spin-1/2 transverse XX and Heisenberg chains with Dzyaloshinskii-Moriya (DM) interaction to study the influence of the latter interaction on the spin-Peierls instability. We found that DM interaction may act either in favour of the dimerization or against it. The actual result depends on the dependence of DM interaction on the distortion amplitude in comparison with such dependence for the isotropic exchange interaction.Comment: 12 pages, latex, 3 figure

Potensi Biji Labu Kuning sebagai Agen Fitoestrogen pada Wanita Post Menstrual

Osteoporosis and hypercholesterolemia are prevalent condition in menopausal women. The common therapy to prevent the estrogen degrading condition is Hormone Replacement Therapy (HRT). However, HRT possessed various risks. Curcubita pepo L. seed (pumpkin seed) contains lignan secoisolariciresinol and lariciresinol which exhibit estrogenic effect. The aim of this study is to determine the estrogenic effect of Ethanolic Extract of Pumpkin Seeds (EEPS) through in silico and in vivo study. In silico study were conducted by molecular docking of lignan which is secoisolariciresinol and lariciresinol with Estrogen Receptor (ERα and Erβ). In vivo study conducted by using ovariectomized Sprague dawley female rats as a model of postmenopausal women. Blood lipid profile, bone density, and uterine weight were assayed after thirty days. Molecular docking score of secoisolariciresinol and lariciresinol were similar to estradiol. In vivo study found that EEPS increase bone density and uterine weight percentage while also improve the blood profile. In conclusion, these result showed that EEPS is potential to be developed as an osteoporosis and hypercholesterolemia prevention agent

Insights from an exploratory survey based assessment of the deep–sea fish resources of the continental slope in the Indian EEZ

With declining catches from inshore waters, there is increasing importance being attributed to development of offshore fishing activities. However, unless this development is based on sound scientific basis, taking into account the biological characteristics of the resources, the virgin biomass and fishing grounds available, sustainability will be compromised, resulting in a boom and bust phenomenon. The biological processes such as growth, maturation, feeding, fecundity of the deep-water species are less known than commercially exploited shelf species and can only be assessed using dedicated deep-water exploratory surveys. Time series data obtained through fishery independent surveys are thus critical for making reliable fish stock assessments. It is in this context that the findings under the Centre for Marine Living Resources & Ecology (CMLRE) funded project “Assessment of Deep–Sea Fishery Resources of the Continental Slope of the Indian EEZ” have aimed to achieve the objectives of assessing the magnitude and distribution of the deep-sea fishery resources of the continental slope region through exploratory surveys, and biological information of the hitherto untapped resources, which will be useful for informed decision making on fishing and management strategies to be adopted while developing deep-sea fisheries. An associated outcome was the development of geo-referenced database on trawlable fishing grounds obtained during the several exploratory surveys. This was possible as fishing trials were operated after scanning all the potential fishing grounds in a particular transect for their suitabilit