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Biofluorescence is widespread among marine fish but remains poorly documented in polar ecosystems. Using hyperspectral imaging, we report fluorescent emissions in two polar zoarcid eelpouts. A captive Antarctic eelpout ( Pachycara brachycephalum ) displayed uniform bright green fluorescence (~500–520 nm), whereas an Arctic eelpout ( Lycodes reticulatus ) showed weaker patterned emissions (~510–590 nm). Under identical illumina...
Effects of chronic nitrate stress on Litopenaeus vannamei reared in indoor aquaculture systemsNARA Subscribed
The control of toxic nitrogenous compounds such as ammonia and nitrite is well established as part of farm management protocols for indoor Litopenaeus vannamei aquaculture. In comparison, nitrate (NO 3 -N) levels are often disregarded due to relative low toxicity to shrimp, as evidenced by the lack of studies on chronic nitrate stress. In the current study, 160 individuals of L. vannamei in the grow-out stage were exposed to 5...
The effect of diet on the growth and energy budget of juvenile Neostichopus grammatusNARA Subscribed
Providing optimum energy levels in diets for sea cucumbers is essential, as an excess or inadequate energy level can lead to a reduced growth rate. This study investigated the effect of diets on the growth and energy budget of juvenile sea cucumber Neostichopus grammatus for twelve weeks. The diets are abalone waste (AB); abalone waste mixed with powdered Ulva lacinulata (A + U) and Gracilaria gracilis ; abalone (A + G), formu...
The effect of temperature and sand substrate in tanks on the growth and survival of the warty sea cucumber Neostichopus grammatusNARA Subscribed
Water temperature and the presence of sand substrate are considered critical environmental factors affecting the growth of cultured sea cucumbers. This study investigated the effects of water temperatures and the presence or absence of sand substrate in tanks on the growth of N. grammatus fed an equal ration of abalone waste for eight weeks. Sea cucumbers with a mean weight of 8.34 g were used for the study. The treatments use...
Aim The urgency for remote, reliable and scalable biodiversity monitoring amidst mounting human pressures on ecosystems has sparked worldwide interest in Passive Acoustic Monitoring (PAM), which can track life underwater and on land. However, we lack a unified methodology to report this sampling effort and a comprehensive overview of PAM coverage to gauge its potential as a global research and monitoring tool. To address this...
Coculture of abalone (Haliotis midae) and sea cucumber (Neostichopus grammatus) to reduce tank cleaning frequency in abalone farmingNARA Subscribed
Abalone farming produces nutrient-rich sludge, and the frequent cleaning and removal of sludge from abalone tanks is labour and capital-intensive. This study aimed to assess the effect of culture methods and tank cleaning frequency on abalone growth, water quality, and sludge characteristics. The study was conducted for 16 weeks. Four treatments were used, namely, abalone cocultured with sea cucumber cleaned once (AS1) and twi...
Precisely analysing and optimising feeding regimes is central to salmonid growth performance and delivery of special diets. The current study developed novel video surveillance methods and analysis techniques to assess individual feed intake and minimum pellet intake (MPI) in individually identified juvenile rainbow trout, Oncorhynchus mykiss. Three trials were conducted to test the impact of short-term starvation ( N =112 [16...
Sleeping tree selection and related behaviours of a family group and a solitary female siamang ( Symphalangus syndactylus ) were investigated over a 5-month period in northern Sumatra, Indonesia. We performed all day follows, sleeping tree surveys and forest plot enumerations in the field. We tested whether: (1) physical characteristics of sleeping trees and the surrounding trees, together with siamang behaviours, supported se...
Role of deposit‐feeding sea cucumbers in integrated multitrophic aquaculture: progress, problems, potential and future challengesNARA Subscribed
There is significant commercial and research interest in the application of sea cucumbers as nutrient recyclers and processors of particulate waste in polyculture or integrated multitrophic aquaculture ( IMTA ) systems. The following article reviews examples of existing IMTA systems operating with sea cucumbers, and details the role and effect of several sea cucumber species in experimental and pilot IMTA systems worldwide. Hi...
Screening lentil germplasm for stemphylium blight resistanceNARA Subscribed
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