Abstract Understanding the age structure and population dynamics of harvested species is crucial for sustainability, especially in fisheries. The Bigmouth Buffalo ( Ictiobus cyprinellus ) a fish endemic to Mississippi Hudson Bay drainages. A valued food-fish centuries, they are now prized sportfish as night bowfishing has become million-dollar industry past decade. All harvest virtually unregulated unstudied, declining while little known about their biology. Using thin-sectioned otoliths...

Abstract Although the pace of senescence varies considerably, physiological systems that contribute to different patterns are not well understood, especially in long-lived vertebrates. Long-lived bony fish (i.e., Class Osteichthyes) a particularly useful model for studies because they can readily be aged and exhibit some longest lifespans among In this study we examined potential relationship between age multiple including: stress levels, immune function, telomere length individuals ranging...

The bigmouth buffalo ( Ictiobus cyprinellus) is an iconic freshwater fish native to North America that in decline. Recent studies have revealed exhibit a slow pace of life, yet demographic information on outside Dakota and Minnesota lacking. We used otoliths investigate population demographics Canada, also monitored spawning frequency reproductive success the wild. From sample 52 collected during 2018–2021 we found from Qu'Appelle system more than 125 years old. Only 13 year classes ranging...

Despite decades of commercial harvest bigmouth buffalo (Ictiobus cyprinellus) from Jamestown Reservoir, North Dakota, and the recent rapid growth sport bowfishing that targets this species, there is a lack biological information on native catostomid. At present, no-limit recreational occurs in with no harvest-reporting for take. A long-lived life history was recently documented life-span exceeding 100 years. were aged to 58 years age, onset sexual maturity 10 females. Evidence episodic...

Abstract The Sport Fish Restoration Program (SFR) has been a stable and highly successful funding program supporting state fisheries research, propagation, management activities since its inception in 1950. expanding sport of bowfishing the past 2 decades, research over comparable time period showing very long lifespans underappreciated native fish species, opens door to some new ways classify, manage, fund monitoring these natives under SFR program, while encouraging commercial take...

Abstract The Blue Sucker Cycleptus elongatus is an imperiled North American catostomid in need of management and protection. No hard structures are validated for aging this species, but past studies focused on somatic such as fin rays scales. Calculated parameters (mortality, recruitment, growth) that inform decisions directly influenced by the accuracy precision structure used to estimate age. We identify most precise credible with which age Suckers while also completing first in‐depth...

The bowfin Amia calva is an amiid (Amiiformes) relict native to North America. It the last surviving member of Halecomorphi, a group fishes that evolved more than 250 million years ago. Despite phylogenetic significance amiids in vertebrate evolution, little has been published about their age and growth. Recreational harvest currently unregulated throughout most USA, yet new recreational fisheries are emerging. As such, increasingly harvested by sport bowfishing without limit, addition...

During the 1910s three buffalofish species (Catostomidae: Ictiobus cyprinellus, I. bubalus, niger) were reared in ponds along Mississippi River. Individuals of these buffalofishes transported to locations across United States support or establish commercial fisheries, including Roosevelt Lake, Arizona 1918. 1930s-1960s a fishery existed on ending by 1970. Scarce information exists since. From 2018 2023 we studied from nearby Apache Lake (adjacent and downstream Lake) collaboration with...

Abstract Stock assessments for Shovelnose Sturgeon have largely been limited to age and growth analyses using pectoral fin rays despite potential underestimation of lack validation. Fisheries stock rely on accurate estimates vital rates effective fisheries management, within which fish lifespan are primary importance. Age was estimated otolith sections, bomb radiocarbon ( 14 C) dating applied cores determine validate ages. reading straightforward, whereas most thin sections provided two...

Except for one unconfirmed case, chironomid larvae have been reported to pass through four larval instars between egg and pupal stages. We observed a fifth instar be standard life-cycle feature of the podonomine Trichotanypus alaskensis Brundin 1966 in tundra ponds on Arctic Coastal Plain near Barrow, Alaska. T. has one-year life cycle these arctic ponds. Adults emerge June ~2-3 weeks after pond thaw, then mate oviposit; most newly-hatched reach IV by October when sediments freeze....

Parthenogenesis, reproduction without fertilization, is not common in the Chironomidae (Diptera), a family of insects with more than 6,000 described species. Nonetheless, parthenogenetic species and strains have been documented at least three subfamilies (the Chironominae, Orthocladiinae, Telmatogoninae), spanning 17 genera ~30 One such species, Paratanytarsus laccophilus Edwards 1929, known to be small portion its range Finland, most other European populations this showing evidence sexual...

Abstract Stable isotope analysis (SIA) can be a powerful tool for investigating trophic ecology and energy fluxes through an ecosystem. In fish, muscle tissue is generally preferred SIA due to its intermediate turnover rate, even though sampling often lethal. Here, we evaluated the feasibility of fin clip model using as nonlethal alternative (nitrogen, δ 15 N carbon, 13 C) in Spotted Gar Lepisosteus oculatus Alligator Atractosteus spatula . We also investigated effects locality, age, size...

Abstract Basic life history information can be useful for informing the management of protected species such as Pahrump Poolfish Empetrichthys latos , a goodeid (Cyprinodontiformes) that is endemic to Mojave Desert in southern Nevada, USA, and last surviving remnant . Critically endangered extirpated from its native range, has been managed among constructed refuge habitats since 1971. To better understand sex‐specific age demographics, we used thin‐sectioned otoliths 121 one population,...