Justin Bopp

• Doctor of Philosophy
• Offshore wind fisheries specialist at Massachusetts Division of Marine Fisheries

Abstract Identifying mechanisms that underpin animal migration patterns and examining variability in space use within populations is crucial for understanding population dynamics and management implications. In this study, we quantified the migration rates, seasonal changes in migratory connectivity, and residency across population demographics (ag...

The effects of the interaction between sandy, mobile, low-relief (sorted) bedforms and two sewage outfalls were investigated along the south shore of Long Island, NY. Sand bedforms at scales from ripples to ridges are common on continental shelves. In dynamic environments, these features can migrate 10s to 100s of meters per year, especially during...

Grass carp (Ctenopharyngodon idella), an invasive cyprinid within the Laurentian Great Lakes, is naturally reproducing in several Lake Erie tributaries, which has raised concerns of the species’ spread throughout Lake Erie and the other Great Lakes. Knowledge of the recent invasion extent outside of the western basin of Lake Erie, particularly in e...

Objective In recent decades, widespread evidence of declining Walleye Sander vitreus recruitment in the Midwestern United States has raised concerns about diminishing ecological benefits and fishing opportunities, which in turn has resulted in natural resource agencies using stocking to supplement populations. Success of Walleye stocking events var...

Parasitic infections can have profound implications on host fitness, yet there is minimal information on parasites of the American horseshoe crab (Limulus polyphemus), a species that has experienced recent population declines. Therefore, we aimed to quantify the prevalence, intensity, and gill surface area coverage of the ectoparasite Bdelloura can...

Understanding the timing and drivers of migration can be beneficial for improving response efforts aimed at reducing invasive species densities. Efforts by management agencies to remove grass carp (Ctenopharyngodon idella), an invasive species to the Laurentian Great Lakes, have been ongoing in Lake Erie tributaries since 2018. To bolster efforts,...

Horseshoe crabs (Limulus polyphemus) exhibit ontogenetic and geographic variability in migratory patterns, yet the implications of movement on their resource use dynamics remain poorly understood. Here, we evaluate horseshoe crab resource use across ontogeny (instars 14-18 and adults), sex, seasons, and between two spatially distinct populations th...

Quantifying predator–prey interactions and gaining insights into predator behavior are crucial for optimizing restoration strategies. However, such knowledge is often lacking for marine invertebrates. We examined potential impacts of predation by channeled Busycotypus canaliculatus and knobbed whelks Busycon carica on natural and planted population...

Quantifying predator-prey interactions and gaining insights into predator behavior are crucial for optimizing restoration strategies; yet, such knowledge is often lacking for marine invertebrates. We examined potential impacts of predation by channeled ( Busycotypus canaliculatus ) and knobbed whelks ( Busycon carica ) on natural and planted popula...

Horseshoe crabs, the most well-known example of "living fossils", are iconic and ecologically important macroinvertebrates in coastal and estuarine ecosystems. Their blood is a crucial resource for manufacturing Limulus or Tachypleus amebocyte lysate to detect bacterial endotoxins or fungal contamination in drug and medical devices. An enhanced und...

American horseshoe crabs (Limulus polyphemus) have varied migration patterns and harvesting pressure throughout their range, potentially leading to regional differences in population dynamics. Here, a multi-state mark–recapture model was used to estimate annual survival and exchange rates of adult horseshoe crabs across three geographic regions in...

This Crustacean fisheries research and management article provides an overview of the production from the world's major crustacean fisheries, their general biology and life history including information on the unusual growth processes of regular replacement of their exoskeleton (or molting) which all crustaceans undergo throughout their life. The e...

In population ecology, it is crucial to assess spatial distributions and migration patterns to understand habitat preferences, and the exchange of individuals between populations. Here, a multi-state model was used to estimate annual trends of movements and survival of adult horseshoe crabs (Limulus polyphemus) around the Long Island, NY region. Da...