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Who has access to online library databases?
Due to licensing restrictions, off-campus access to databases is generally reserved only for current LSU faculty, staff, and students. On-campus access should be available to anyone connected to the LSU Wireless network. Because public patrons do not have access to LSU Wi-Fi, LSU Library houses a few public access computers in room 241. Non-affiliates and public patrons who are able to visit in person will have full access to databases using these computers. We also have a list of open access databases that should be accessible to everyone from anywhere (see below). The online library catalog is also open to everyone. LSU Libraries | A–Z Databases: Open Access
LSU Libraries | Library Catalog
Related: Can patrons not affiliated with LSU access the campus Wi-Fi network?
Related: Are there computers I can use in the library? Answered by: Access Services Staff
How can I renew my books?
There are three different ways you can renew your LSU Library books:
- In-person: Bring your items to the checkout desk in room 241 of LSU Library. Be sure to bring your TigerCard or public patron ID.
- Online: Log into your online library account (link below) and select the "Checkouts" tab.
- Self-checkout: Renew your items using the self-checkout station in room 141 of LSU Library. Be sure to bring your TigerCard or public patron ID. Please contact the Circulation department with additional questions or concerns: libcirc@lsu.edu (mailto:libcirc@lsu.edu) . LSU Libraries | Library Catalog Account Answered by: Access Services Staff
Why does my library account say that I am blocked, that I am barred, or that my status is expired?
Users can encounter several different types of status messages. Patrons with questions about their account status can visit the checkout desk in room 241 of LSU Library and ask to speak to a staff member. Alternatively, patrons can reach out to us via e-mail at libcirc@lsu.edu (mailto:libcirc@lsu.edu) . When contacting us via e-mail, LSU students, staff, and faculty should message us from their LSU e-mail address; public patrons should message us from the e-mail address we have on file. For privacy reasons, we cannot discuss the details of patron accounts over the telephone. Expired: Students must be currently enrolled in classes in order to be granted library privileges. Once they graduate, or if they fail to register on time in accord with the deadlines posted on LSUs academic calendar, their privileges expire. If they try to log in to their library account after that date, they will see an alert message informing them that their account has expired. Graduate students who have received a masters degree but are continuing on to get their PhD may also have their privileges expire earlier than expected. The library receives weekly updates on student status from the Registrars Office. Once the semester has begun, if students register during the week, their accounts will not be updated and their privileges extended in the system until the following Monday morning. Blocked: Users with overdue recalled books will have their accounts blocked by the system. Their accounts will remain blocked until the book is returned. The system will not permit staff members to override blocks or to renew books that have been recalled. The only way to remove a block from an account is to return the materials. Barred: Users can be barred from using library materials for a number of reasons, the most common being that they have been billed for lost items. They can also be barred if they resign from the university, if their classes are purged, or for flagrant violations of library policy. If they try to log into their account after they have been barred, they will receive an alert message that tells them that they have been barred. Answered by: Access Services Staff
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Recreational shellfish harvesting on a sandy beach in the Algarve coast (southern Portugal): First appraisal of the annual catch of wedge clams (Donax trunculus)
This study aimed to characterise the recreational harvesting of wedge clams (Donax trunculus) in the Algarve coast (southern Portugal) and estimate its annual catches by recreational harvesters (RHs). For this purpose, 50 harvesting surveys were performed along the sandy intertidal during one-year (May 2022 - April 2023), roughly on a weekly basis during suitable tidal ranges (≤ 1.0 m). Overall, RHs were gender-balanced and older harvesters (≥ 65 years-old) prevailed. RHs were clearly more numerous from late spring to summer, especially in August, with most RHs collecting wedge clams with foot / hand and only a minority (≈20 %) also using a shrimp-net. RHs catches comprised mostly D. trunculus below the minimum conservation reference size (MCRS = 25 mm in shell length) legally stipulated for this species. The estimation of RHs annual catches of D. trunculus was based on standardised catches per harvester (number and weight hour−1), extrapolated using the total number of RHs and suitable tides for wedge clams recreational harvesting during the one-year study period. Collecting and processing geolocated data on RHs activity allowed mapping the spatial-temporal distribution of the recreational harvesting effort targeting wedge clams, further confirming the importance of spatial data as a support tool for management and decision-making processes. This study further confirmed the need to raise awareness and inform RHs about the best harvesting practices, aiming ultimately to improve the assessment and promote the long-term sustainable management of this recreational activity and shellfish resource.
Modelling approaches to distinguish whiting species in mixed-species commercial catches, and the impact on stock status metrics
Catch allocation models can split aggregated mixed-species catches into individual species for stock assessments and fisheries management. In this paper, we evaluate a suite of these models for splitting mixed ‘trawl whiting’ catches into eastern school whiting (Sillago flindersi) and stout whiting (S. robusta) allocations for a commercial ocean prawn trawl fishery in New South Wales (NSW), Australia. Accuracy of the models was evaluated against a scientific observer survey which accurately recorded species catches, and we compared the modelled allocations to an existing coarse ‘rule-based’ allocation. There was no single best structure for the allocation model, but the most successful models included depth as a covariate because this helped split species along habitat preferences. The model-based allocations reduced trip-level error by around 40 % compared to the existing rules, and removed an existing bias in total catch estimates. This led to altered time series of catches and catch-per-unit-effort, especially for northern zones. When data were analysed for the entire NSW region, the catch allocation process (existing or modelled) had little impact on resulting indices of relative abundance for each whiting species, even when using a spatio-temporal standardization model. This was likely due to changes affecting scale rather than trend and our indices being rescaled to better compare time periods. Therefore, past stock assessments relying on statewide indices derived from existing rule-based allocations are likely reliable. Nevertheless, the modelled allocations were more accurate at a local and zonal scale, which will enable analyses with a finer spatial resolution in future stock assessments. Additional observer surveys are an important tool for ongoing improvement and validation of our allocation models.
Spawning stock recovery of Pacific bluefin tuna (Thunnus orientalis): Evidence from length, age and catch data of Taiwanese longline fishery in 2010–2023
Pacific bluefin tuna (Thunnus orientalis, PBF), a highly migratory and commercially important species, faces intense fishing pressure. Taiwanese PBF catches, which reached a nadir in 2012, gradually increased from 2014 onwards, culminating in a dramatic fivefold surge after 2019. This study analyzed the adult population from PBF landings in Taiwan from 2010 to 2023 to inform fisheries management. We found a strong correlation between declining juvenile catches in Japanese troll or purse seine fishery and increasing adult catches in Taiwanese and Japanese longline fishery, with a 7–9 year lag. Age estimation, using otolith annuli and age-length keys, revealed a temporal shift in age composition. Despite the substantial increase in Taiwanese catch size, the average age of landed PBF decreased. The spawning stock, previously dominated by older individuals (14–18 years), now primarily consisted of younger fish (8–12 years). Prior to 2014, most PBF measured between 220 and 240 cm in fork length; after 2017, this range generally decreased to 200–220 cm. Permutation test using fish size and otolith direct ageing data suggested a lower mean fork length at age for the PBF landed in the recent years compared to earlier years. Furthermore, a linear mixed model showed a relationship between fork length and fishing year, indicating a consistent decrease in fork length across all age groups. These results suggest that reduced fishing pressure on juvenile PBF (0–1 years old) has allowed more individuals to reach adulthood, contributing to the observed recovery of the spawning population. These findings provide valuable insights into the effective fishery management and PBF stock rebuilding in Taiwan and other regions.
Spatial-temporal strategy and fishing practices drive catch composition in FAD-associated tuna purse seine fisheries in the Western and Central Pacific Ocean
The widespread use of drifting fish aggregation devices (FADs) in tuna purse seine fisheries since the mid-1990s has raised sustainability concerns due to increased fishing mortality of unwanted species, such as small-sized tunas and silky sharks (Carcharhinus falciformis, FAL). A better understanding of ways to mitigate the catch unwanted species while increasing the catch of target species is critical for developing ecosystem-based management approaches. Here, we analyzed fisheries logbook data and scientific observer records of 345 FAD-associated fishing sets collected in the Western and Central Pacific Ocean to assess the influence of spatial-temporal strategies and fishing practices on the catch composition. Results demonstrate that technical adjustments can enhance the potential sustainability of tuna purse seine fisheries. Especially, small-sized tuna catches were concentrated in northern and eastern regions (2°N–6°N, 170°E–175°E), while FAL bycatch exhibited a more widespread distribution. Fishing practices factors, such as the duration of the purse seine gear set (∼9 min) and the time of the set relative to sunrise (∼30 min); substantially increased tuna catches while minimizing small-sized tuna catches. Seasonal analysis revealed that the pre-closure period (January to June) positively impacted tuna catches and reduced small-sized tuna catches. Moreover, FADs submerged structure at depths of 80 m stabilized tunas and FAL, while small-sized tunas tended to associate with deeper structures (90 m).
Effects on catches of green and blue light emitting diodes at the frame lines of diurnally deployed estuarine penaeid trawls
Penaeid trawls are among the world’s least selective fishing gears. This characteristic has justified decadal attempts at resolution and most commonly via retroactively fitted ‘bycatch reduction devices’ in the posterior sections to promote fish escape. However, ideally unwanted species would never enter a trawl. This study sought to investigate if fish could be avoided in diurnally deployed estuarine penaeid trawls via light emitting diodes (LEDs) located at the frame lines (headline and footrope). The assumption of few confounding effects of attaching six inactive LEDs (i.e. structures) to the frame lines was validated (experiment 1) before separate experiments were done to assess the effects on catches due to six active blue or green LEDs on the footrope (experiment 2) and then on the headline (experiment 3). Catches of the targeted school prawns, Metapenaeus macleayi and some fish (across all sizes; 4–20 cm total lengths), including mulloway, Argyrosomus japonicus, southern herring, Herklotsichthys castelnaui, and painted stinkfish, Eocallionymus papilio were similarly and significantly lower in trawls with at least one active LED treatment, and with greater consistency when these were on the headline. Some loss of target catches would preclude the commercial use of LEDs on the frame lines of the tested trawls. However, evidence of strong responses among some fish and their known behavioural and swimming differences to penaeids might support testing LEDs at other locations, including inside trawls, to reduce bycatches while maintaining target catches.
Impact of climate change on the distribution of potentially suitable habitat areas for major catch fish in the Beibu Gulf, South China Sea
Highlights •The spatial distribution of fishery stocks in the Beibu Gulf is jointly influenced by environmental factors and human activities such as fishing pressure.•Climate change is projected to alter the spatial aggregation patterns of fish populations, with noticeable shifts in species distribution centroids.•Under different CO2 emission scenarios (RCP2.6 and RCP8.5), significant differences in habitat suitability and expansion trends were observed among fish species.•Sciaenidae is identified as a potentially vulnerable taxon under the low-emission scenario (RCP2.6), showing a reduction in suitable habitat.•Fish community structure in the Beibu Gulf is expected to undergo further changes in response to future climate-driven habitat shifts.
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